body, h1, h2, h3, h4, h5, h6, hr, p, blockquote, dl, dt, dd, ul, ol, li, button, input, textarea, th, td {
  margin: 0;
  padding: 0;
}
// 去除移动端点击有高亮背景色
li, a, button, input, textarea {
  -webkit-tap-highlight-color: transparent;
}
body {
  box-sizing: border-box;
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
}
ul, ol {
  list-style: none;
}
a {
  text-decoration: none;
  background-color: transparent;
}
a:hover, a:active {
  outline-width: 0;
  text-decoration: none;
}
table {
  border-collapse: collapse;
  border-spacing: 0;
}
hr {
  border: 0;
  height: 1px;
}
img {
  border-style: none;
  &:not([src]) {
    display: none;
  }
}
svg {
  &:not(:root) {
    overflow: hidden;
  }
}
html {
  -webkit-touch-callout: none;
  -webkit-text-size-adjust: 100%;
}
input, textarea, button, a {
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
}
article, aside, details, figcaption, figure, footer, header, main, menu, nav, section, summary {
  display: block;
}
audio, canvas, progress, video {
  display: inline-block;
}
audio:not([controls]), video:not([controls]) {
  display: none;
  height: 0;
}
progress {
  vertical-align: baseline;
}
sub, sup {
  position: relative;
  font-size: 75%;
  line-height: 0;
  vertical-align: baseline;
}
sub {
  bottom: -0.25em;
}
sup {
  top: -0.5em;
}
button, input, select, textarea {
  font-size: 100%;
  outline: 0;
}
button, input {
  overflow: visible;
}
button, select {
  text-transform: none;
}
textarea {
  overflow: auto;
}
button, html [type="button"], [type="reset"], [type="submit"] {
  -webkit-appearance: button;
}
button::-moz-focus-inner, [type="button"]::-moz-focus-inner, [type="reset"]::-moz-focus-inner, [type="submit"]::-moz-focus-inner {
  border-style: none;
  padding: 0;
}
button:-moz-focusring, [type="button"]:-moz-focusring, [type="reset"]:-moz-focusring, [type="submit"]:-moz-focusring {
  outline: 1px dotted ButtonText;
}
[type="checkbox"], [type="radio"] {
  box-sizing: border-box;
  padding: 0;
}
[type="number"]::-webkit-inner-spin-button, [type="number"]::-webkit-outer-spin-button {
  height: auto;
}
[type="search"] {
  -webkit-appearance: textfield;
  outline-offset: -2px;
}
[type="search"]::-webkit-search-cancel-button, [type="search"]::-webkit-search-decoration {
  -webkit-appearance: none;
}
::-webkit-input-placeholder {
  color: inherit;
  opacity: .54;
}
::-webkit-file-upload-button {
  -webkit-appearance: button;
  font: inherit;
}
.clearfix {
  zoom: 1;
  &:after {
    content: '';
    display: block;
    clear: both;
    width: 0;
    height: 0;
    line-height: 0;
    font-size: 0;
    visibility: hidden;
    overflow: hidden;
  }
}